| 21. | Manufactured retroreflectors modeled after a " tapetum lucidum " are described in numerous patents and today have many uses.
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| 22. | Some species have a tapetum, a reflective layer which bounces light that passes through the retina back through it again.
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| 23. | Pollen structure shows that of the two main tapetum types, secretory and plasmodial, the lilioid monocots are nearly all secretory.
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| 24. | Eyeshine is the result of a light-gathering layer in the eyes called the tapetum lucidum, which reflects white light.
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| 25. | Similar adaptations occur in some species of spiders, although these are not the result of a " tapetum lucidum ".
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| 26. | Most primates, including humans, lack a " tapetum lucidum ", and compensate for this by perceptive recognition methods.
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| 27. | When light shines into the eye of an animal having a " tapetum lucidum ", the pupil appears to glow.
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| 28. | The tapetum is a reflective surface behind the retina that reflects light to give the photoreceptors a second chance to catch the photons.
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| 29. | The tapetum lucidum, in animals that have it, can produce eyeshine, for example as seen in cat eyes at night.
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| 30. | Some species are able to effectively turn their tapetum off in bright conditions, with a dark pigment layer covering it as needed.
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